work study vs time study

work study and time study both are nouns.

Word	Noun	Adjective	Verb	Adverb
work study	Yes	No	No	No
time study	Yes	No	No	No

As nouns, work study and time study are synonyms defined as:

work study and time study: an analysis of a specific job in an effort to find the most efficient method in terms of time and effort

Other synonyms of work study include motion study, time-and-motion study, time-motion study, time and motion study.

work study (noun)	time study (noun)
an analysis of a specific job in an effort to find the most efficient method in terms of time and effort	an analysis of a specific job in an effort to find the most efficient method in terms of time and effort